/*
 * Copyright (c) 2015 Spotify AB.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.spotify.heroic.metric;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import java.io.IOException;

public class MetricTypeSerialization {
    public static class Deserializer extends JsonDeserializer<MetricType> {
        @Override
        public MetricType deserialize(JsonParser p, DeserializationContext c) throws IOException {
            if (p.getCurrentToken() != JsonToken.VALUE_STRING) {
                throw c.wrongTokenException(p, JsonToken.VALUE_STRING, null);
            }

            final String identifier = p.getValueAsString();

            if (identifier == null) {
                throw c.mappingException("No identifier specified");
            }

            return MetricType
                .fromIdentifier(identifier)
                .orElseThrow(() -> c.mappingException("Not a valid metric source: " + identifier));
        }
    }

    public static class Serializer extends JsonSerializer<MetricType> {
        @Override
        public void serialize(MetricType s, JsonGenerator g, SerializerProvider provider)
          throws IOException {
            g.writeString(s.identifier());
        }
    }
}
